Coarse Symbol Boundary Detection in OFDM Receivers
AssigneeST-Ericsson SA
InventorAchraf DHAYNI
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Abstract
A method for determining a symbol boundary in a data packet belonging to a received OFDM signal is provided. The data packet includes a first training filed and a second training field, which begins with a guard interval. The method includes detecting the beginning of the data packet, and starting an automatic gain control process. The method further includes, after the automatic gain control process is locked, determining autocorrelation peaks and estimating the symbol boundary from times of the autocorrelation peaks.
Claims15
A method for determining a symbol boundary in a data packet belonging to a received Orthogonal Frequency-Division Multiplexing, OFDM, signal, said data packet comprising a first training filed and a second training field beginning by a guard interval, said method comprising:
- detecting a beginning of the data packet;
- starting an automatic gain control process;
- and
- after said automatic gain control process is locked, determining autocorrelation peaks, and estimating said symbol boundary from times of said autocorrelation peaks.
A receiver configured to determine a symbol boundary in a data packet belonging to a received Orthogonal Frequency-Division Multiplexing, OFDM, signal, said data packet comprising a first training field and a second training field beginning by a guard interval, an said receiver comprising:
- means for detecting a beginning of the data packet;
- an automatic gain control functional block;
- and
- a frame validation functional block for, after said automatic gain control process is locked, determining autocorrelation peaks, and estimating said symbol boundary from the times of said autocorrelation peaks.
Dependencies are inferred from the claim text.